100 Quantitative Aptitude Shortcut Tricks with practice - Multiplying numbers just over hundred
Multiplying numbers just over 100.
108 x 109 = 11772
The answer is in two parts: 117 and 72,
117 is just 108 + 9 (or 109 + 8),
and 72 is just 8 x 9.
Similarly 107 x 106 = 11342
109 x 105 = 11445
102 x 108 = 11016
105 x 115 = 12075
105 x 108 = 11340
109 x 102 = 11118
HOW USEFUL IS THIS CALCULATION!
EXAMPLE:
Compute the amount and the compound intrest on Rs 10000.00 on 2.years at4%per annum.
Now 4x4=16 and 4+4=8 put 10 it becomes Rs 10816.00
How simple ! no calculation no extra time !
Practice Set
Solve mentally these questions
Note down your calculation time by watch
(Suggested time 90 seconds)
102 X 102 103 X 105 108 X 104
101 X 102 102 X 103
104 X 105 105 X 106
108 X 109 109 X 109
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